<!-- <!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Hello World</title>
    <style>
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            margin: 0;
            background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
            overflow: hidden;
        }
        h1 {
            color: #fff;
            font-size: 3.5rem;
            text-align: center;
            text-shadow: 0 0 10px rgba(255,255,255,0.5);
            animation: fadeIn 2s ease-in-out;
            z-index: 10;
        }
        @keyframes fadeIn {
            0% { opacity: 0; transform: translateY(-20px); }
            100% { opacity: 1; transform: translateY(0); }
        }
        .bg-bubbles {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: 1;
        }
        .bg-bubbles li {
            position: absolute;
            list-style: none;
            display: block;
            width: 40px;
            height: 40px;
            background-color: rgba(255, 255, 255, 0.15);
            bottom: -160px;
            border-radius: 50%;
            animation: square 20s infinite;
            transition-timing-function: linear;
        }
        .bg-bubbles li:nth-child(1) {
            left: 10%;
        }
        .bg-bubbles li:nth-child(2) {
            left: 20%;
            width: 90px;
            height: 90px;
            animation-delay: 2s;
            animation-duration: 17s;
        }
        .bg-bubbles li:nth-child(3) {
            left: 25%;
            animation-delay: 4s;
        }
        .bg-bubbles li:nth-child(4) {
            left: 40%;
            width: 60px;
            height: 60px;
            animation-duration: 22s;
            background-color: rgba(255, 255, 255, 0.25);
        }
        .bg-bubbles li:nth-child(5) {
            left: 70%;
        }
        .bg-bubbles li:nth-child(6) {
            left: 80%;
            width: 120px;
            height: 120px;
            animation-delay: 3s;
            background-color: rgba(255, 255, 255, 0.2);
        }
        .bg-bubbles li:nth-child(7) {
            left: 32%;
            width: 160px;
            height: 160px;
            animation-delay: 7s;
        }
        .bg-bubbles li:nth-child(8) {
            left: 55%;
            width: 20px;
            height: 20px;
            animation-delay: 15s;
            animation-duration: 40s;
        }
        .bg-bubbles li:nth-child(9) {
            left: 25%;
            width: 10px;
            height: 10px;
            animation-delay: 2s;
            animation-duration: 40s;
            background-color: rgba(255, 255, 255, 0.3);
        }
        .bg-bubbles li:nth-child(10) {
            left: 90%;
            width: 160px;
            height: 160px;
            animation-delay: 11s;
        }
        @keyframes square {
            0% {
                transform: translateY(0);
            }
            100% {
                transform: translateY(-700px) rotate(600deg);
            }
        }
    </style>
</head>
<body>
    <h1>Hello World</h1>
    <ul class="bg-bubbles">
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
    </ul>
</body>
</html> -->

<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>默认页面</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Microsoft YaHei', Arial, sans-serif;
            background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            overflow: hidden;
            position: relative;
        }

        body::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: 
                radial-gradient(circle at 20% 30%, rgba(255,255,255,0.1) 0%, transparent 40%),
                radial-gradient(circle at 80% 70%, rgba(255,255,255,0.1) 0%, transparent 40%);
            z-index: -1;
        }

        .default-container {
            background: rgba(255, 255, 255, 0.08);
            padding: 40px;
            border-radius: 20px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
            width: 600px;
            max-width: 90%;
            backdrop-filter: blur(12px);
            position: relative;
            overflow: hidden;
        }

        .default-container::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: linear-gradient(45deg, transparent, rgba(255,255,255,0.1), transparent);
            transform: rotate(30deg);
            z-index: -1;
        }

        .header {
            text-align: center;
            margin-bottom: 30px;
        }

        .header h1 {
            color: #fff;
            font-size: 32px;
            font-weight: 600;
            margin-bottom: 10px;
            text-shadow: 0 0 10px rgba(0, 200, 255, 0.5);
        }

        .header p {
            color: #a0d2ff;
            font-size: 16px;
        }

        .content {
            background: rgba(255, 255, 255, 0.1);
            padding: 30px;
            border-radius: 15px;
            margin-bottom: 20px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(5px);
        }

        .content h2 {
            color: #fff;
            font-size: 24px;
            margin-bottom: 15px;
        }

        .content p {
            color: #c0e4ff;
            line-height: 1.6;
            margin-bottom: 15px;
        }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin-top: 20px;
        }

        .feature-card {
            background: rgba(255, 255, 255, 0.1);
            padding: 20px;
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: all 0.3s ease;
            backdrop-filter: blur(5px);
        }

        .feature-card:hover {
            transform: translateY(-5px);
            background: rgba(0, 201, 255, 0.1);
            box-shadow: 0 5px 20px rgba(0, 201, 255, 0.2);
        }

        .feature-card h3 {
            color: #fff;
            font-size: 18px;
            margin-bottom: 10px;
        }

        .feature-card p {
            color: #a0d2ff;
            font-size: 14px;
        }

        .action-buttons {
            display: flex;
            gap: 15px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn {
            padding: 12px 24px;
            border: none;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
            position: relative;
            overflow: hidden;
            z-index: 1;
        }

        .btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, #00a3ff 0%, #0055cc 100%);
            opacity: 0;
            transition: opacity 0.3s ease;
            z-index: -1;
        }

        .btn-primary {
            background: linear-gradient(135deg, #00c9ff 0%, #0066ff 100%);
            color: white;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 20px rgba(0, 201, 255, 0.5);
        }

        .btn-primary:hover::before {
            opacity: 1;
        }

        .btn-secondary {
            background: rgba(255, 255, 255, 0.1);
            color: white;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(255, 255, 255, 0.1);
        }

        .btn-secondary:hover::before {
            opacity: 1;
        }

        .footer {
            text-align: center;
            color: #a0d2ff;
            font-size: 12px;
            margin-top: 20px;
        }

        .footer a {
            color: #00c9ff;
            text-decoration: none;
            transition: all 0.3s ease;
            position: relative;
        }

        .footer a:hover {
            color: #00a3ff;
        }

        .footer a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 1px;
            background: #00c9ff;
            transition: width 0.3s ease;
        }

        .footer a:hover::after {
            width: 100%;
        }

        @media (max-width: 480px) {
            .default-container {
                padding: 30px 20px;
            }
            
            .header h1 {
                font-size: 28px;
            }
            
            .feature-grid {
                grid-template-columns: 1fr;
            }
        }
    </style>
</head>
<body>
    <div class="default-container">
        <div class="header">
            <h1>欢迎来到默认页面</h1>
            <p>这是一个简洁优雅的默认页面模板</p>
        </div>

        <div class="content">
            <h2>页面功能</h2>
            <p>这个默认页面包含了常见的页面元素和布局，您可以根据需要进行自定义和扩展。页面采用了现代化的设计风格，具有良好的响应式布局。</p>
            
            <div class="feature-grid">
                <div class="feature-card">
                    <h3>🎨 现代化设计</h3>
                    <p>采用渐变背景和毛玻璃效果，视觉效果优雅现代</p>
                </div>
                <div class="feature-card">
                    <h3>📱 响应式布局</h3>
                    <p>适配各种设备尺寸，在手机和平板上也有良好表现</p>
                </div>
                <div class="feature-card">
                    <h3>⚡ 流畅动画</h3>
                    <p>精心设计的过渡动画，提升用户体验</p>
                </div>
                <div class="feature-card">
                    <h3>🔧 易于定制</h3>
                    <p>代码结构清晰，便于根据需求进行修改和扩展</p>
                </div>
            </div>
        </div>

        <div class="action-buttons">
            <!-- 使用 a 标签直接跳转到登录页面 -->
            <a href="Login.html" class="btn btn-primary">登录</a>
            <!-- 使用 a 标签直接跳转到注册页面 -->
            <a href="Register.html" class="btn btn-primary">注册</a>
            <a href="#" class="btn btn-secondary">返回首页</a>
            <a href="#" class="btn btn-secondary">关于我们</a>
        </div>

        <div class="footer">
            <p>&copy; 2024 我的网站. 保留所有权利.</p>
            <p>
                <a href="#">服务条款</a> | 
                <a href="#">隐私政策</a> | 
                <a href="#">联系我们</a>
            </p>
        </div>
    </div>
</body>
</html>